Random Access Memory (RAM) is volatile primary memory and so that data and instructions stored on RAM are lost when the computer is switched off.
RAM has the term ‘random access’ because data can be stored and accessed from any location within the memory.
RAM is used to hold data and instructions that are currently in use. RAM in a modern PC is used to hold the operating system and any open document/programs that are open currently.
The contents in RAM is can be changed at any time, you can do this by simply overwriting them with other data/instructions. For example, a user might want to shut down a document and open another or run a different program.
The more RAM a computer has, the more data and programs it can hold at the same time. Also, RAM is easily upgrade-able. Unlike other types of primary memory.
TIP - RAM can be read from and also can be written to.